Using these fender overlays is a breeze. First, make sure the fender area where you'll install them is clean and dry. Peel off the backing of the overlay and carefully place it over the painted fender vent portion above and below the WRX or STI logo. Press it down firmly to ensure a good adhesion. Remember, these are sold as a set and you only need one set per vehicle. Also, the set does not come with fender emblems. For maintenance, just use a mild soap and water to clean the overlays. Avoid using abrasive cleaners as they might damage the 3D carbon fiber vinyl texture.